--1
insert into student values('200515001','趙菁菁' ,'女',23,'CS')
insert into student values('200515002','李勇' ,'男',20,'CS')
insert into student values('200515003','張力' ,'男',19,'CS')
insert into student values('200515004','張衡' ,'男',18,'IS')
insert into student values('200515005','張向東' ,'男',20,'IS')
insert into student values('200515006','張向麗' ,'女',20,'IS')
insert into student values('200515007','王芳' ,'女',20,'CS')
insert into student values('200515008','王民生' ,'男',25,'MA')
insert into student values('200515009','王小民' ,'女',18,'MA')
insert into student values('200515010','李晨' ,'女',22,'MA')
insert into student values('200515011','張毅' ,'男',20,'WM')
insert into student values('200515012','楊磊' ,'女',20,'EN')
insert into student values('200515013','李晨' ,'女',19,'MA')
insert into student values('200515014','張豐毅' ,'男',22,'CS')
insert into student values('200515015','李蕾' ,'女',21,'EN')
insert into student values('200515016','劉社' ,'男',21,'CM')
insert into student values('200515017','劉星耀' ,'男',18,'CM')
insert into student values('200515018','李貴' ,'男',19,'EN')
insert into student values('200515019','林自許' ,'男',20,'WM')
insert into student values('200515020','馬翔' ,'男',26,'CS')
insert into student values('200515021','劉峰' ,'男',25,'MA')
insert into student values('200515022','牛站強' ,'男',22,'CS')
insert into student values('200515023','李婷婷' ,'女',18,'IS')
insert into student values('200515024','嚴麗' ,'女',20,'CM')
insert into student values('200515025','朱小鷗' ,'女',30,'WM')insert into course values('1','數據庫','5',4)
insert into course values('2','數學',null,2)
insert into course values('3','信息系統','1',4)
insert into course values('4','操作系統','6',3)
insert into course values('5','數據結構','7',4)
insert into course values('6','數據處理',null,2)
insert into course values('7','PASCAL語言','6',4)
insert into course values('8','大學英語',null,4)
insert into course values('9','計算機網絡',null,4)
insert into course values('10','人工智能','13',2)
insert into course values('11','DB_Security','1',2)
insert into course values('12','DB_System','1',2)
insert into course values('13','Image Processing',null,3)
insert into course values('14','計算機科學導論',null,1)insert into sc values('200515001','1',75)
insert into sc values('200515002','1',85)
insert into sc values('200515002','3',53)
insert into sc values('200515003','1',86)
insert into sc values('200515004','1',74)
insert into sc values('200515005','1',58)
insert into sc values('200515006','1',84)
insert into sc values('200515004','2',46)
insert into sc values('200515005','2',89)
insert into sc values('200515006','2',65)
insert into sc values('200515008','2',72)
insert into sc values('200515009','2',76)
insert into sc values('200515010','2',96)
insert into sc values('200515010','8',86)
insert into sc values('200515011','8',62)
insert into sc values('200515015','8',0)
insert into sc values('200515018','8',58)
insert into sc values('200515001','4',62)
insert into sc values('200515002','4',85)
insert into sc values('200515021','9',54)
insert into sc values('200515001','5',58)
insert into sc values('200515021','6',58)
insert into sc values('200515001','7',70)
insert into sc values('200515005','10',65)
insert into sc values('200515016','8',null)
insert into sc values('200515017','8',null)
insert into sc values('200515019','12',85)
insert into sc values('200515022','11',70)
--2
update student
set Sname='李詠'
where Sname = '李勇' and Sdept = 'CS';
--3.
update course set Ccredit=3
where Cname = '數據處理'
--4.
update sc set Grade=Grade+5
where Cno = '1'
--5.
update sc set Grade = Grade+5
where Cno in
(
select Cno from course where Cname= '大學英語'
);
--6.
update student set Sname = '王丹丹',Ssex='女',Sage=20,Sdept='MA'
where Sno = 200515010
--7.
delete from student where Sdept=''
--8.
delete from student where Sage > 25 and Sdept = 'CS'
--9.
delete from course where Ccredit < 2
